If you really choose such solution, I think you could use CLIENTID column in JMS users table. JMS_USERS (USERID VARCHAR(32) NOT NULL, ..., CLIENTID VARCHAR(128) NULL Then consecutive user with the same client_id throws Exception during connect. I havent tried it , but ocassionally I accidentally I got such excecptions during configuring JMS regards jzimon View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4162725#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...